Laptop tachometer - RPM from Sound
Posted May 11, 2011 - 02:14 PM
The program is quick to download and straightforward to run. For a four cycle you need to set it at 2 cycles per ignition and about 100Hz frequency. It has one draw back in that you have to preselect the rpm range and the max has to be less than double the minimum, so it needs to be tweaked to get the full range of a GT engine, but if you don't have a tachometer but have a laptop and a microphone (and I guess most of us have those) it gives you a pretty good idea of your engine speed.
I have found it very useful for setting the idle speed and max speed after fiddling with the carburetor. And it's free.
- ducky, MH81, LPBolens and 4 others have said thanks
Posted May 11, 2011 - 02:49 PM
Posted May 11, 2011 - 02:58 PM
Posted May 11, 2011 - 03:05 PM
Posted May 11, 2011 - 03:22 PM
Posted May 12, 2011 - 01:47 AM
I have a cheap netbook with a built in mic, but I have no idea what the response range is, it might not be rated for 100 Hz.
Posted May 12, 2011 - 04:52 PM
- WQDL753 said thank you
Posted July 31, 2011 - 05:35 AM
Posted August 07, 2012 - 06:00 PM
- DH1 said thank you